Curling at the Olympics is basically icy chess: two teams slide heavy stones toward a target and score based on which stones are closest to the center after each round (called an “end”).

The basic idea

  • Teams slide polished granite stones down a long sheet of ice toward a circular target called the house.
  • After all stones in an end are thrown, only one team scores.
  • The goal is to have more of your stones closer to the center “button” than your opponent’s closest stone.

Game format at the Olympics

  • Events: men’s, women’s, and mixed doubles.
  • Length:
    • Men’s & women’s: 10 ends.
* Mixed doubles: 8 ends.
  • Stones per end:
    • Men’s & women’s: 8 stones per team (4 players, 2 stones each).
* Mixed doubles: 5 stones per team.

If the score is tied after the scheduled ends, they play extra ends until one team wins an end and the game.

How scoring works

  • Only stones touching the house (the colored rings) can score.
  • At the end of an end:
    1. Find the stone closest to the button.
    2. The team that owns that stone scores at least 1 point.
    3. They get 1 point for each of their stones that is closer than the opponent’s nearest stone.
  • If no stones touch the house, or both teams’ closest stones are exactly the same distance, the end is blank and nobody scores.

Example: If the three closest stones are all from Team A, and the fourth- closest belongs to Team B, Team A scores 3 points for that end.

Turns, throwing, and the “hammer”

  • Teams alternate throws one stone at a time.
  • In traditional team events, players throw in a fixed order (lead, second, third/vice, skip), and this order can’t change during the game.
  • The team that throws the last stone in an end is said to “have the hammer,” which is a big advantage because they get the final chance to score or steal points.
  • Before the game, a short pregame test (Last Stone Draw) decides who gets hammer first: players throw practice stones toward the button, and the team with the better average distance earns the hammer.

After each end, hammer switches:

  • The team that scores gives up the hammer next end.
  • If the end is blank, the team that had hammer keeps it.

Key rules and what the sweepers do

  • Release line: Players must let go of the stone before it crosses the hog line ; otherwise that stone is removed from play.
  • Sweeping: Teammates sweep the ice in front of the moving stone to slightly warm the ice, making the stone travel farther and curl less.
  • Strategy: Players can
    • Guard their own scoring stones,
    • Draw into the house to score, or
    • “Take out” opponent stones by hitting them out of the rings.

Because tiny differences in angle and weight change everything, teams talk constantly, plan several shots ahead, and manage risk like they’re playing chess on ice.

Olympic tournament structure

  • The Olympics use a round-robin first: every team plays all (or most) of the others in their group, and standings are based on win–loss record.
  • Top teams advance to the semifinals; winners play for gold, losers play for bronze.
  • Teams can concede once a minimum number of ends have been played (usually 6 in round-robin, 8 in playoffs) if a comeback is very unlikely, and this is considered normal sportsmanship.

Why it looks slow but is actually intense

  • Shot-making is precise down to millimeters, so one poor call or slight miss can flip an entire match.
  • Skips (team captains) are constantly running probabilities in their heads: Do they play safe and give up 1 point, or go aggressive and risk giving up 3?
  • Over a full 10-end game, momentum swings, hammer control, and last-end scenarios make it feel like a slow-building thriller rather than a sprint.

TL;DR: In Olympic curling, teams slide stones toward a target over 8–10 ends, scoring only when their stones are closer to the center than any of their opponents’, with the last-stone “hammer” and careful sweeping and strategy deciding who takes the medals.

Information gathered from public forums or data available on the internet and portrayed here.